A user opened the Palisade software but isn't actually using it; it's just sitting idle on the computer. Can we recover that license for someone who needs it?

The best practice is to educate your users so that this situation doesn't occur. Explain that use of the software is limited to a certain number of users and ask everyone to cooperate in releasing a license when they're not using it.

Suppose people are careless or forget? You can contact the user, go to the computer, or log on remotely, and do any of these to release the license:

Close our software while leaving Excel open, through Utilities » Unload. If two or more of the DecisionTools are open, @RISK and PrecisionTree for example, the license is released when the last one is closed.

Close Excel, and Palisade software will close too. If the workbook has been changed, Excel prompts you to save the changes.